The depolarization phase of an action potential requires . The depolarization phase of an action potential requires . opening of K channels in the membrane a Ca2 concentration gradient across the membrane a K concentration gradient across the membrane opening of Ca2 channels in the membrane opening of Na channels in the membrane

Opening of Na channels in the membrane

Explanation:

Depolarization is the mechanism of opening or closing channels in the membrane. The depolarization of action potential requires opening of Na channels in the membrane to increase the membrane potential through the increased influx of Na ion

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.